Photoemission measurements of transition-metal oxides under laser illumination

J. W. Quilty; J. Y. Son; T. Mizokawa; D. Asakura; N. Motoyama; S. Uchida; T. Kimura; Y. Tokura

doi:10.1016/j.elspec.2005.01.155

Photoemission measurements of transition-metal oxides under laser illumination

J. W. Quilty^*, J. Y. Son, T. Mizokawa, D. Asakura, N. Motoyama, S. Uchida, T. Kimura, Y. Tokura

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The effects of photoexcitation on Sr_14-xCa_xCu ₂₄O₄₁ and La_2-2xSr_1+2xMn ₂O₇ single crystals were measured via X-ray photoemission spectroscopy. Changes observed in the Sr_14-xCa_xCu ₂₄O₄₁ Cu 2p core-level line shape indicate that the cleaved surface is surprisingly unstable under vacuum and that changes in the surface stoichiometry are easily obtained with laser ablation. In La _2-2xSr_1+2xMn₂O₇, the O 1s core-level peak binding energy irreversibly increases upon optical excitation. The magnitude of the increase depends on the sample hole doping and is observed to be largest in a x=0.5 sample, where phase competition between electronic ordered states is strongest. It appears that the photoinduced electronic structural change is permanent due to stabilization by strong electron-lattice coupling.

Original language	English
Pages (from-to)	909-912
Number of pages	4
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	144-147
DOIs	https://doi.org/10.1016/j.elspec.2005.01.155
Publication status	Published - 2005 Jun
Externally published	Yes

Keywords

LaSrMn O
Photoexcitation
SrCaCu O
X-ray photoemission

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Radiation
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

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10.1016/j.elspec.2005.01.155

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@article{d9835fe191144355b9c8803d7f57efc8,

title = "Photoemission measurements of transition-metal oxides under laser illumination",

abstract = "The effects of photoexcitation on Sr14-xCaxCu 24O41 and La2-2xSr1+2xMn 2O7 single crystals were measured via X-ray photoemission spectroscopy. Changes observed in the Sr14-xCaxCu 24O41 Cu 2p core-level line shape indicate that the cleaved surface is surprisingly unstable under vacuum and that changes in the surface stoichiometry are easily obtained with laser ablation. In La 2-2xSr1+2xMn2O7, the O 1s core-level peak binding energy irreversibly increases upon optical excitation. The magnitude of the increase depends on the sample hole doping and is observed to be largest in a x=0.5 sample, where phase competition between electronic ordered states is strongest. It appears that the photoinduced electronic structural change is permanent due to stabilization by strong electron-lattice coupling.",

keywords = "LaSrMn O, Photoexcitation, SrCaCu O, X-ray photoemission",

author = "Quilty, {J. W.} and Son, {J. Y.} and T. Mizokawa and D. Asakura and N. Motoyama and S. Uchida and T. Kimura and Y. Tokura",

year = "2005",

month = jun,

doi = "10.1016/j.elspec.2005.01.155",

language = "English",

volume = "144-147",

pages = "909--912",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

issn = "0368-2048",

publisher = "Elsevier",

}

TY - JOUR

T1 - Photoemission measurements of transition-metal oxides under laser illumination

AU - Quilty, J. W.

AU - Son, J. Y.

AU - Mizokawa, T.

AU - Asakura, D.

AU - Motoyama, N.

AU - Uchida, S.

AU - Kimura, T.

AU - Tokura, Y.

PY - 2005/6

Y1 - 2005/6

N2 - The effects of photoexcitation on Sr14-xCaxCu 24O41 and La2-2xSr1+2xMn 2O7 single crystals were measured via X-ray photoemission spectroscopy. Changes observed in the Sr14-xCaxCu 24O41 Cu 2p core-level line shape indicate that the cleaved surface is surprisingly unstable under vacuum and that changes in the surface stoichiometry are easily obtained with laser ablation. In La 2-2xSr1+2xMn2O7, the O 1s core-level peak binding energy irreversibly increases upon optical excitation. The magnitude of the increase depends on the sample hole doping and is observed to be largest in a x=0.5 sample, where phase competition between electronic ordered states is strongest. It appears that the photoinduced electronic structural change is permanent due to stabilization by strong electron-lattice coupling.

AB - The effects of photoexcitation on Sr14-xCaxCu 24O41 and La2-2xSr1+2xMn 2O7 single crystals were measured via X-ray photoemission spectroscopy. Changes observed in the Sr14-xCaxCu 24O41 Cu 2p core-level line shape indicate that the cleaved surface is surprisingly unstable under vacuum and that changes in the surface stoichiometry are easily obtained with laser ablation. In La 2-2xSr1+2xMn2O7, the O 1s core-level peak binding energy irreversibly increases upon optical excitation. The magnitude of the increase depends on the sample hole doping and is observed to be largest in a x=0.5 sample, where phase competition between electronic ordered states is strongest. It appears that the photoinduced electronic structural change is permanent due to stabilization by strong electron-lattice coupling.

KW - LaSrMn O

KW - Photoexcitation

KW - SrCaCu O

KW - X-ray photoemission

UR - http://www.scopus.com/inward/record.url?scp=17444425353&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=17444425353&partnerID=8YFLogxK

U2 - 10.1016/j.elspec.2005.01.155

DO - 10.1016/j.elspec.2005.01.155

M3 - Article

AN - SCOPUS:17444425353

SN - 0368-2048

VL - 144-147

SP - 909

EP - 912

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

ER -

Photoemission measurements of transition-metal oxides under laser illumination

Abstract

Keywords

ASJC Scopus subject areas

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